JPS59203679A - Washer for inside of tank - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning device used for cleaning the inside of a tank.

Conventional cleaning work has used cleaning equipment with a spray nozzle attached to the tip of the piping, or circular cleaning equipment with many small holes drilled around an annular pipe, but these equipment require a large amount of cleaning fluid. Therefore, cleaning efficiency is low, and if the cleaning device is fixed inside the tank, the nozzle may become clogged with precipitates depending on the solution in the tank. In addition, when operating the cleaning device from outside the tank, there are disadvantages in that it takes time to attach and remove the device from the tank, and the operation is complicated.

The present invention uses a cleaning pipe that includes an injection nozzle and is attached with a spray head that rotates with the flow of cleaning liquid, and automatically inserts the cleaning pipe into a tank and withdraws it from the tank using the hydraulic pressure of the cleaning liquid. The purpose of the present invention is to provide a tank interior cleaning device that solves the above-mentioned problems, has excellent cleaning effects, and is extremely easy to operate.

The gist of the present invention is a cleaning pipe in which a piston is attached to the outer periphery of the upper end of the main pipe, and a spray head having an injection nozzle and rotating with the flow of cleaning liquid is attached to the lower end, the upper end being sealed and the lower end being attached. The main pipe is inserted through a liquid-tight seal part of a cylinder pipe, and the screw line slides up and down inside the cylinder, and a valve is provided at the upper end of the cylinder pipe and the liquid-tight seal part, respectively. There is a structure of a tank internal cleaning device characterized in that a cleaning liquid inflow pipe is provided through the tank.

In other words, when cleaning starts and ends in a cylinder using a cleaning liquid as a working fluid and a cleaning tube with a piston attached, the cylinder is lowered or raised to insert or pull up the spray head of the cleaning tube into the tank. It is something to do.

An embodiment of the device of the present invention will be explained based on the drawings. Fig. 1 is a partially omitted vertical cross-sectional view passing through the center of the cleaning pipe, and shows a spray head 9 having an injection nozzle 8 in the cylinder pipe 1 at the lower end of the main pipe 7. For installation, a cleaning tube is provided at its end with a piston 10 attached annularly around its outer periphery. A compression coil spring 14 is interposed between the compression coil spring 14 and the cylinder sealing plate at the upper end of the cylinder pipe, and a piston receiver 15 is attached to hang from the sealing plate so as to be able to slide up and down within the cylinder. A through hole 16 is provided in the body of the piston receiver, corresponding to the cylinder opening of the cleaning liquid inflow pipe 5, which has a valve v1 attached to the upper end of the cylinder pipe, and the cleaning liquid flows into the cylinder through this through hole. do.

A flange 4 for tank attachment is provided at the lower end of the cylinder tube, a slide bearing 2 is provided at the bottom of the cylinder tube, and a packing 3 is provided on the bearing. It is tightly sealed. A piston receiver 12 that slides inside the cylinder with a compression coil spring 11 interposed is placed on the packing, and this piston receiver has an opening for a cleaning liquid inflow pipe 6 provided with a valve v2 at the bottom of the cylinder pipe. Through holes 13 are provided corresponding to the positions, and the cleaning liquid for pushing up the piston flows into the cylinder pipe through the through holes 13.

Spray head 9 attached to the lower end of the main pipe 7 of the cleaning pipe
is spherical, and spray nozzles 8 are appropriately arranged on its surface, and the cleaning liquid is sprayed in each direction from each nozzle to clean the inside of the tank. At this time, the spray head is rotated by the flow of cleaning liquid passing through it, cleaning the inside of the tank without any corners.

The tank internal cleaning device according to the present invention is selected based on the tank shape, size, cleaning liquid pressure, etc., and depending on the size of the tank, a plurality of devices may be installed in the same tank.

Next, an example of how to install the cleaning device to a tank and how to operate it is as shown in the system diagram of the device in Figure 2.
The cleaning device is attached to the tank 21 via a valve 22 and a sight glass 23 that allow a spray head to pass through, such as a ball valve or gate valve. The cleaning liquid line branches into two, each with valves v1 and v2.
It is connected to the cleaning liquid inflow pipe 5 and the cleaning liquid inflow pipe 6 via.

Note that a branch pipe may be provided between the valve V2 and the cleaning liquid inflow pipe 6, or a valve may be attached thereto, if necessary.

In the cleaning process, the valve v2 is left open, and when the valve Vl is opened, the cleaning liquid flows into the cylinder pipe and the main pipe through the through hole 16 of the piston receiver 15. Since both Vl and V2 are open between the top and bottom of the screw 1 and the screw 10, the cleaning fluid is in communication with the piston. The hydraulic pressure from the side, that is, the hydraulic pressure of the cleaning liquid, is approximately equal to the hydraulic pressure, and therefore, due to the dead weight of the cleaning pipe, the piston 10 moves the liquid between the piston and the liquid-tight seal through the valve v2 to the Vl side, and descends inside the cylinder pipe, moving the cleaning head into the tank. insert it inside. Piston receiver 12 in the cylinder pipe. The spring 11 prevents damage to the device by damping the lowering of the piston. The cleaning liquid passes through the main pipe 7 and is guided to the spray head, and the head rotates while spouting the cleaning liquid from the nozzle to clean the inside of the tank.

After cleaning, if valve v1 is closed, no hydraulic pressure is applied to the upper part of the piston, and the hydraulic pressure of the cleaning liquid acts on the lower side of the piston, and the weight of the cleaning pipe pushes up the piston, causing the spray head to Stored outside the tank. Piston receiver 15. The spring 14 acts as a buffer when the piston rises, eliminating the risk of damage to the device. Although the above embodiment uses a combination of a piston holder and a spring for the buffering effect, the present invention is not limited to this, and the position of the piping, the shape of the piston holder, etc. can be changed as appropriate. Further, in the above embodiment, the piston descends to the lowest part of the cylinder pipe when cleaning starts, but by operating from the outer wall of the cylinder pipe, the piston stop plate is protruded into the cylinder so that it can be stopped halfway, and the spray head is moved into the tank. It may also be possible to descend in stages. Also valve v
It is also possible to maintain the cleaning pipe at a desired position or to gradually lower it by opening and closing 1 as appropriate, or adjusting the degree of opening, depending on the relative strength of the vertical pressure of the piston. Furthermore, valve v
Automatic cleaning is also possible by automatically opening and closing 1 and turning it on and off at regular intervals using a timer or the like.

In addition, in the above installation example, the cleaning device was installed by inserting a valve and a sight glass into the tank, but these are not particularly necessary, and after the spray head is lifted up, the valve is closed to isolate it from the tank. This prevents nozzle clogging, and the sight glass is convenient for inspecting spray heads, etc.

According to the apparatus of the present invention, the cleaning operation can be performed by simply opening and closing the valve Vl with the valve V2 always open, and the operation is extremely simple. In addition, the pressure of the cleaning liquid is used to raise and lower the cleaning pipe, so no other power source is required. In addition, as well as open tanks,
Closed and pressurized tanks can also be cleaned with the tank closed. Furthermore, since it does not use a power source, there is no risk of sparks, etc., and it can be used even in explosive atmospheres, and can be safely used for high-pressure cleaning with high-pressure water. In addition to water, a solvent or the like can be used as the cleaning liquid. By inserting the original pulp between the tank and the cleaning device, it is possible to prevent nozzle clogging while the device remains attached to the tank.

In addition, when the piston moves up and down, the leakage of gas in the tank from the gland part of the cleaning device is suppressed by the hydraulic pressure of the cleaning liquid, so it can be operated in an extremely safe condition, so it is effective for cleaning. It can be said that this cleaning device has excellent operability, safety, and reliability.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted vertical sectional view passing through the center of the cleaning pipe of the tank internal cleaning device according to the present invention, and FIG. 2 is a schematic system diagram showing an example of how the device is attached to a tank. 1...Cylinder pipe, 2...Slide bearing. 3...Packskin, 4...Flange. 5.6...Cleaning liquid inflow pipe. 7...Main pipe, 9...Spray head. 10...Bis 1-ne, 11.14...Spring. 12, 15...Piston holder, 13.16...
...Through hole. Vl, V2...Valve. Patent applicant Memoto Zeon Co., Ltd. Representative Patent attorney Keiji Matsunaga Figure 1

Claims (1)

[Claims] 1. @A cleaning tube with a piston attached to the outer periphery of the upper end in an annular shape, and a spray head with a spray nozzle attached to the lower end that rotates with the flow of cleaning liquid, with the upper end sealed and the lower end sealed liquid-tight. The piston is configured to slide up and down within the cylinder by inserting the main pipe into a liquid-tight seal part of the cylinder pipe, and a cleaning liquid inflow pipe is provided through a valve at the upper end of the cylinder pipe and the liquid-tight seal part, respectively. A tank interior cleaning device characterized by: